fix(core): refactor dataclass to use class vars

src/core/pubkeys.py

@@ -4,7 +4,6 @@ This module contains only system-level addresses that are shared across all plat
 Platform-specific addresses are handled by their respective AddressProvider implementations.
 """
 
-from dataclasses import dataclass
 from typing import Final
 
 from solders.pubkey import Pubkey
@@ -13,11 +12,6 @@ from solders.pubkey import Pubkey
 LAMPORTS_PER_SOL: Final[int] = 1_000_000_000
 TOKEN_DECIMALS: Final[int] = 6
 
-
-@dataclass
-class SystemAddresses:
-    """System-level Solana addresses shared across all platforms."""
-
 # Core system programs
 SYSTEM_PROGRAM: Final[Pubkey] = Pubkey.from_string("11111111111111111111111111111111")
 TOKEN_PROGRAM: Final[Pubkey] = Pubkey.from_string(
@@ -37,6 +31,17 @@ class SystemAddresses:
     "So11111111111111111111111111111111111111112"
 )
 
+
+class SystemAddresses:
+    """System-level Solana addresses shared across all platforms."""
+    
+    # Reference the module-level constants
+    SYSTEM_PROGRAM = SYSTEM_PROGRAM
+    TOKEN_PROGRAM = TOKEN_PROGRAM
+    ASSOCIATED_TOKEN_PROGRAM = ASSOCIATED_TOKEN_PROGRAM
+    RENT = RENT
+    SOL_MINT = SOL_MINT
+    
     @classmethod
     def get_all_system_addresses(cls) -> dict[str, Pubkey]:
         """Get all system addresses as a dictionary.